The strange thing about this discovery is that scientists haven’t actually seen the planet at all. But they believe something big is out there because of gravitational irregularities in the Kuiper Belt (the solar system beyond the orbit of Neptune).

What scientists noticed was that they couldn’t account for anomalies in the way certain objects and planets were moving around in that area. But when researchers used a simulation to add a new planet to the Kuiper Belt, suddenly those movements made sense. Which means scientists know something has to be there, they just haven’t actually located it yet.

It shouldn’t be too hard to find, given the planet is supposed to have 10 times the mass of Earth (we’re kidding, the solar system is huge–good luck with that). But the ironic part about this discovery is that it was made by the same people who demoted poor Pluto in the first place. Those who took away our ninth planet are now seeking to provide us with a new one.